DeBano S J, Hamm P B, Jensen A, Rondon S I, Landolt P J
Oregon State University, Hermiston Agricultural Research and Extension Center, Hermiston, OR 97838, USA.
Environ Entomol. 2010 Feb;39(1):1-14. doi: 10.1603/EN08270.
A landscape-scale study from 2004 to 2006 investigated the spatial and temporal dynamics of a new pest to the Columbia Basin of the Pacific Northwest, the potato tuberworm, Phthorimaea operculella (Zeller). Male P. operculella were monitored in spring, summer, and fall each year with a pheromone-baited trapping network in Oregon and Washington. The objectives of the study were to (1) describe the temporal and spatial dynamics of the recent outbreak of P. operculella in the region and (2) examine the relationship of the spatial and temporal distribution of the outbreak and weather (air temperature, precipitation, and dew point) and geographic variables (elevation and latitude). Weather data during the P. operculella outbreak were compared with a reference period (1993-1999) that occurred before the outbreak. The outbreak in 2004, which caused the first widespread tuber damage in the region, was positively associated with warmer temperatures in the preceding fall and in the spring, summer, and fall of the growing season. October and November 2003 and March 2004 were also drier than the reference period. However, the winter of 2003/2004 was colder than the reference period and thus mild winter conditions did not explain the outbreak. The importance of environmental variables on the seasonal spatial distribution of the pest each year was examined using nonparametric multiplicative regression. Locations with higher spring, summer, or fall temperatures were associated with increased trapping rates in most seasons. Elevation and latitude seemed to play a constraining role, because low trapping rates of P. operculella were associated with higher elevations and latitudes.
2004年至2006年开展的一项区域尺度研究，调查了太平洋西北地区哥伦比亚盆地的一种新害虫——马铃薯块茎蛾（Phthorimaea operculella (Zeller)）的时空动态。每年春季、夏季和秋季，利用信息素诱捕网络在俄勒冈州和华盛顿州对雄性马铃薯块茎蛾进行监测。该研究的目的是：（1）描述该地区近期马铃薯块茎蛾爆发的时空动态；（2）研究爆发的时空分布与天气（气温、降水量和露点）及地理变量（海拔和纬度）之间的关系。将马铃薯块茎蛾爆发期间的天气数据与爆发前的参考期（1993 - 1999年）进行比较。2004年的爆发导致该地区首次出现大面积块茎损害，这与前一年秋季以及生长季的春季、夏季和秋季气温较高呈正相关。2003年10月和11月以及2004年3月也比参考期更干燥。然而，2003/2004年冬季比参考期更寒冷，因此暖冬并非爆发的原因。利用非参数乘法回归分析了每年环境变量对该害虫季节性空间分布的重要性。在大多数季节，春季、夏季或秋季气温较高的地点诱捕率较高。海拔和纬度似乎起到了限制作用，因为马铃薯块茎蛾的低诱捕率与较高的海拔和纬度相关。
